The MFS High Income Municipal Trust Shares (CXE) is a mutual fund that focuses on investing in high-yield municipal bonds. These bonds are issued by state and local governments to fund various projects and are considered to be relatively safe investments. The fund aims to provide investors with a steady stream of income through the interest payments on these bonds. With a focus on municipal bonds, the fund offers tax-exempt income for investors, making it an attractive option for those seeking tax-efficient investments. The CXE fund is managed by MFS Investment Management, a well-respected and experienced investment firm.